[2/2] LED: Battery Light

PS2: Fix variable and fw/base overlays logic
PS3: works
PS4: change title to: Battery LED

Signed-off-by: Andre Saddler <dresadd09691@gmail.com>
Change-Id: I9c737d0cf49a1f84688b4295975e13dd8e91f874

Conflicts:
	src/com/android/settings/DisplaySettings.java